CT Series Step Motors

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  • Step Motor Selection Guide

    CT Series Step MotorsCTM Maximum SeriesCTP Performance Series

  • Application Centers Global Design & Engineering CentersGlobal Manufacturing Operations

    Danaher Motion - Helping you build a better machine, faster

    Danaher Corporation combined over 30 industry-leading brands such as Kollmorgen, Thomson, Dover, Pacific Scientific, Portescap, Neff, Seidel and Bautz to establish a customer-focused motion control manufacturing company called Danaher Motion. We offer this powerful set of integrated motion control technologies under the Danaher Motion and Thomson brand names. We are a $1B+ global motion control leader, unique in our ability to marshal decades of application experience and technical innovation to help you build better machines, faster.

    Danaher Motion defines high standards of quality, innovation and technology. We enable improved machine performance and reliability while controlling costs. Our global manufacturing footprint, rapid customization and prototyping capabilities drive quick lead times. Unmatched application experience and design expertise empowers you to commission machines faster.

    Consider your options in todays market for a motion control partner. Select Danaher Motion and join a team with 6100 employees, over 60 years of application experience and 2000+ distributor locations around the globe. Danaher Motion serves industries as diverse as semiconductor, aerospace and defense, electric vehicle systems, packaging, printing, medical and robotics. We offer an unparalleled depth and breadth of motion control product solutions through a worldwide service and support infrastructure, field service engineers and support teams available when and where you need them.

    The Danaher Business System - Building sustainable competitive advantage into your business

    The Danaher Business System (DBS) was established to increase the value we bring to customers. It is a mature and successful set of tools we use daily to continually improve manufacturing operations and product development processes. DBS is based on the principles of Kaizen which continuously and aggressively eliminate waste in every aspect of our business. DBS focuses the entire organization on achieving breakthrough results that create competitive advantages in quality, delivery and performance advantages that are passed on to you. Through these advantages Danaher Motion is able to provide you faster times to market as well as unsurpassed product selection, service, reliability and productivity.

    Local Support Around the Globe

  • www.danahermotion.com

    CT Series Step Motors

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    Table of Contents

    Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

    Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

    Basic Step Motor Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

    Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    Connection Diagrams & Switching Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    CTP1 - Size 17 Step Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 9

    CTM2/CTP2 - Size 23 Step Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 11

    CTM3/CTP3 - Size 34 Step Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 13

    Motor/Drive System Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

    24 Volt Speed Torque Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

    36 Volt Speed Torque Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

    72 Volt Speed Torque Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

    340 Volt Speed Torque Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

    Conversion Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

  • www.danahermotion.com4

    Danaher Motion has combined high performance step motor designs with world wide manufacturing capabilities to create the new CT Series Step Motors. All CT Series Step Motors incorporate innovative cooling technology (patent pending), high torque magnetic designs, rugged bearings, and high voltage insulation systems. These features provide high torque motors, which support large mechanical loads, and can be used with all drives. In addition, CTM Maximum Series Step Motors use patented enhancing technology to increase efficiency and provide even more torque at all speeds.

    Outstanding performance is only part of the CT story. CT Series motors are available in the most popular sizes (17, 23, and 34), and are available in a variety of lengths, windings and shafts.

    Custom MotorsDanaher Motion routinely provides motors with many types of modifi cations. Please contact us with your specifi c requirements.

    Shaft Modifi cationsA variety of motor output shaft modifi cations can be supplied. These include special fl ats and keyways, lengths, diameters, through holes and similar changes which may be needed to allow mounting of leadscrews, timing belts, pulleys or gears.

    Electrical Modifi cationsMotors can be supplied with a number of electrical modifi cations, including: nonstandard lead lengths, electrical connectors and special windings.

  • www.danahermotion.com

    CT Series Step Motors

    5

    CT Series Step Motors . . . run cooler, produce more torque, and support higher shaft loads than any other step motor.

    CTM Series motors incorporate patented enhancing magnets in the stator to provide 25% more torque at all speeds. The increased power output comes from higher efficiency. This allows the use of smaller drives and power supplies. Available in size 23 and size 34 motors.

    All CT motors utilize high torque magnetic designs that feature a large rotor diameter, small air gap, high energy rotor magnets and computer controlled windings. This provides maximum torque in thesmallest package.

    Lower Energy Usage Faster Machines Lower System Cost More Compact Machines

    Cooling Shell (patent pending) Aluminum shell and aluminum end-caps quickly remove heat from the motor. This allows for higher current and torque ratings, especially when the motor is mounted. CT motors produce the same torque at lower temperatures for longer life.

    Faster, higher throughput machines Reduced size Longer life

    Large Bearing SystemTo accommodate high thrust loadsand high side loading, CT Series motors feature large bearings.

    Size 23 & 34 motors have the front bearing retained with a snap ring. And, the rear bearing is mounted in an O-ring to prevent spinout and minimize motor noise. Lower machine costs. Loads can be directly mounted on motor shaft eliminating couplings and load support bearings. Excellent for leadscrew applications Longer life

    High Voltage InsulationInset molded insulation system encases the stator, eliminating joints and gaps that can fail. Reliability and voltage ratings are increased. CT Series motors can be used with all standard drives, as well as high voltage high performance drives.

    Faster design cycles knowing CT Series motors work with all drives. Higher reliability

  • www.danahermotion.com6

    Enhanced CTM motors use additional magnets inserted between each stator tooth. These magnets block the magnet fields from flowing around the stator teeth. This forces more of the magnetic field to flow through each tooth where it produces torque.

    Standard Step Motor

    Typical paths of flux transfer in an energized conventional hybrid step motor. Some flux leakage occurs in normal operation.

    Enhanced Step Motor

    Patented enhancing technology redirects magnetc flux to inhibit leakage and optimize torque production.

    Basic Step Motor OperationCT Series step motors have two windings (two phases) that are energized with DC current. When the current in one winding is reversed, the motor shaft moves one step, or 1.8. By reversing the current in each winding the position and speed of the motor is easily and precisely controlled, making these motors extremely useful for many different motion control applications.

    For even finer resolution and smoother operation, micro-stepping drives divide eac

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